Set of key buttons for a handset



FIG. 1 is a front view of a set of key buttons for a handset showing mynew design in the broken line environment of a handset; and,

FIG. 2 is a perspective front view thereof.

The broken line showing disclaimed regions in the figures is forillustrative purposes only and forms no portion of the claimed design.

The ornamental design for a set of key buttons for a handset, as shownand described.